Igniting device for miners&#39; safety-lamps.



P. A. wicks & R. GARTENMEISTER. IGNITING'DEVIGE FOR MINERS SAFETY LAMPS.

APPLICATION FILED JULY 8, 190B.

Patented Deb. 29

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Wf MM 7 F. A. WIGKE & R. GARTENMEISTBR. IGNITING DEVICE FOR MINERS' SAFETY LAMPS. APPLICATION FILED JULY 8, 1908.

Patented Dec. 29, 1908.

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UN TED srarss FERDINAND ARTHUR WIOKE, OF BA RMEN, AND RUDOLF Gifit'llrlfiiilEXSZLTER, OF ELBEPr-Z GERMAN Y.

Iem'rme DEVICE FOR Tp'aZZ whom it may concern: I

Be t known that we, FERDINAN ARTHUR WICKE and Runonr GARTENMEISTER, citi- Zens of the German Empire, residing at Barmen and Elbeiield, in the Province of Rhonish Prussia and Kingdom of Prussia, Germany, have invented certain new and useful Improvements in Igniting Devices for Mintains to make and use the same.

This invention relates to an im rovement in devices for igniting miners ety lamps and consists of the combination of primers and a platinum wire adapted to become incandescent and ignite the primer which in succession ignites the wish of said miners safety lamp. In this case ignition takes place at a tem erature far lower than that necessary in t e case of the well-known "forms as the explosion temperature of the priming composition is far lower than the ignition temperature of the gases rising in the lamp wicl. The consequence is that the current requisite for heating the igniting wire up to (at most) red-heat may be considerably less than the currents employed in Well-known electric igniting" devices used in miners lamps so that the saving in current is very considerable. It is in particular to be emphasized that the number of times that it is possible to ignite the lamps is not do- 1pendent on the life of the wire as this is unmited, but solely and alone on the length of the'priming band, or rather on the number .of primers, so that said number of times may be lncreased at will by increasing the length of said band. The new arrangement can be applied in the simplest manner both in lam s oi Well-known construction and also in maning' new lamps.

The accompanying drawings illustrate by way of example, the bottom portion of two forms of lamps according to the invention.

Figure 1 s ows in front elevation the first form of the bottom portion of a miners safety lamp, part of the protective casing being omitted, While Fig. 2 shows said bottom por tion in plan. Fig. 3 is a front elevation of thesecond form of the bottom portion of a safety lamp said second form being distinguished from the first merely by the priming band being moved by turning a horizontal Specification of Letters Patent. Application filed July 8, 1908.

Serial No. 33,557.

mandrel or spindle, whereas in nrst said. band moved. by turning a mandrel spindle. a plan or second form and a section pert oi the line AA,

I A suitable source 3 ct current, which may be for example a small accumulator the curved form of the lamp base, is h the bottom portion 1 of the lamp, chi tom portion is constructed in a welldniow manner, bymean of a sheet metal casing The poles 4, 5 o the accumulator are connected with the contacts 6, and. the latter with the leads 8, S. in the lead 8 there connect ed resistance in the form of a coil or" wire 10 for regulating the current necessary for heating the igniting wir The lead 9 runs direct y to the contact 11 of the contactpiece 12, the other contact 13 of which is connected ith the lead 8. From the contacts 1]., 13 there runs the well insulated lead is to the igniting wire 15 which is a bright thin platinum wire situated directly in the neighborhood of the priming band 16.

If the circuit usually interrupted at 17 is closed, the igniting wire 15 begins region and by virtue of its ignites the nearest primer on the priming band 16. By turning the vertical mandrel 18 another primer brought under the platinum wire ready for the next igniting operation. The priming band 16 is led close past the lamp wick 19 as in well known constructions so that the leaving the wiclg are ignited on the explosion of a primer taking place.

The form shown in Figs. 3 to 5 is intended for miners sai'etylamps in which the feed motion of the priming hand is effected by a hori 'zontal mandrel or soindle. The external form of the lamp is su stantiaily the same as that of the first form and the electric, igniting device is the some if small differences in de. tails be disreg Lrded. which diil'erences due to the type of lamp being different. The usually interrupted circuit be closed in the well-lrnown manner by means of a pressbutton, but it is more advantageous so to connect the contact-device with the horizontal mandrel 20 for feeding forward priming band 16 that the closure of the ci cuit is effected only during the feeding ion ward of the riming band. For this the mandrel 20 passes through the bent c springs 21, 22 which ordinarily do not touch one another and an insulating ring 23 pushed on the mandrel, which ring lies against the spring 21 and is pressed againstthe springs 21 and 22 when the handle ring 24 is raised by said ring or rather by small. pins 25 projecting from it, so that springs 21 and 22 come into contact with one another and close the circuit. Each time that the priming'band is to be fed forwards it is necersary to raise the handle-ring which usually hangs down, and as the circuit is dircca closed by the handle-ring on being raised, ignition will occur immediately after a fresh rimer has passed under the platinum wire.

n account of the fact that when the handlering is let go the circuit is immediately broken again, it follows that the consumption of cur-.

rent is reduced to a very small amount and it is impossible for the circuit to be closed at l the wrong time as is possible when an ordinary press-button being employed the latter is handled carelessly. All parts of the circuit are well insulated so that sparking, which might lead to the ignition of fire-damp, cannot take place.

Having now described our invention we declere that what We desire to secure by Letters Patent is:

1. In a miners safety lamp the combination with the lamp wick of a priming com position in proximity thereto and a th n-platinum wire heated by an electric current and adapted to i nite said composition.

2. In a ininers safety lamp the combination with the lamp wick of a priming COI'HPO' sition in proximity thereto, a fixed and permanently serviceable thin platinum wire heated by an electric current and adapted when heated to ignite said composition, a source of current and connections between the latter and said wire.

3. In a miners safety lamp the combination with the lamp wick of a priming composition a priming band supporting said .composition in proximity to said wick two spindles sup orting said band a medium heated by an e ectric current and adapted when heated to ignite said composition, a source of current and connections between the latter and said medium.

4. In a miners safety lamp the eoiiihiiianation with the lamp wick of a priming (UHF position a priming band supporting said composition in proximity to said wick two spindles su porting said band a fixed and perinanent y serviceable thin platinum ire heated by an electric current and adapted when heated to ignite said coiiiposilioii, a source of current and connections between the latter and said wire.

5. In a miners safety lamp tlic eoiiihinanation with the lamp wick of a pruning Hil position, a pi'iiiiiiig hand supporting said JOIiipGfilt-IOI] in lproxiiiiily to said wick, a llOl'lZUIitttl spiiid c and aiiothoixspindle suportiinsaid hand a medium over said hand D and heated by an electric current ano adapted when heated to ignite said composition, a source of current and connections between the latter and said medium.

6. In a miners safety lamp the combination with the lamp wick of a priming composition a priming band supporting said composition in proximity to said wick, a horizontal spindle and another spindle supporting said band, a thin platinum wire over said band and heated by an electric current and adapted when heated to ignite said composition, a source of current and connections between the latter and said wire.

7. In a miners safety lamp the combination with the lamp wick of a priming composition, a priming band supporting said composition in proximity to said wick, a horizontal spindle and another spindle supporting said hand, a fixed and permanently serviceable thin platinum wire over said band and heated by an electric current and adapted when heated to i nite said com )osition a n .l

source of current and connections between the latter and said wire.

8. In a miners safety lamp the combination with the lamp wick of a priming composition, a priming band supporting said composition in proximity to said wick, two spindles supportiijig said band, means for turning one of said spindles a medium heated by an electric current and adapted when heated to ignite said composition, a source of current, connections between the latter and said medium means for controlling said connections, and means interconnecting the means for turning one of the spindles and the means for controlling said connections.

9. in a miners safety lamp the combination with the lamp wick of a priming composition, a priming band supporting said orting said band, means for turning saidiorizontal spindle a platinum wire fixed directly over said band and heated by an electric current and adapted when heated to ignite said composition, a source of current, connmctioiis between the latter and said wire, means for controlling said connections, and means interconnecting the means for turning the horizontal spindle and the means for corn trolling said connections.

10. In a miners safety lamp the combination with the lamp wick of a priming composition, a priming band supporting said composition in proximity to said wick, a horizontal spindle 20 and another spindle supporting said band, means for turning said horizontal spindle, a medium heated by an electric current and adapted when heated to ignite said composition, a source of current, roiiiu-ctioiis between. the latter and said medium, a iiieiiibor for controlling said connections and a handle-ring 24 revolublc on eoaesz e the spindle 2-0 and normally hanging down therefrom, said handle-ring having pins 25 whereby when the handle-ring is raised tor the purpose of turning the spindle said pins press against the member for controlling the connections.

11. In a miner's safety lamp the combination with the lamp Wick of a priming composition, a priming hand supporting said composition in proximity to said wick, a horizontal spindle 20 and another spindle supporting said band, means for turning said horizontal spindle, a medium heated by an electric current and adapted when heated to ignite said composition, a source of current,

connections between the latter and said medium, a ring 23 for controlling said con nections and slidingly mounted on said horizontal spindle and a handlering 24 revoluble on the spindle 20 and normally hanging down therefrom, said handle-ring having pins whereby When the handle-ring is raised for the purpose of turning the spindle said pins press against the ring 23 for controlling the connections.

12. In a miners safety lanip the combination with the lamp wick of a priming comon the spindle 20 and normally hanging down 1 therefrom, said handle-ring having pins 25 whereby when the handle--ring is raised for the purpose of turning the spindle said pins press against the ring 23 for controlling the connections.

In testimony whereof, We have signed our names to this specification in the presence of two subscribing witnesses.

FERDINAND ARTHUR WICKE. RUDOLF GAlt-TlllllllElSTEK Witnesses:

O'r'ro Kerrie, WM. WASHINGTON BRUNSWICK.

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